Estimating the infection and case fatality ratio for coronavirus disease (COVID-19) using age-adjusted data from the outbreak on the Diamond Princess cruise ship, February 2020

Adjusting for delay from confirmation to death, we estimated case and infection fatality ratios (CFR, IFR) for coronavirus disease (COVID-19) on the Diamond Princess ship as 2.6% (95% confidence interval (CI): 0.89-6.7) and 1.3% (95% CI: 0.38-3.6), respectively. Comparing deaths on board with expected deaths based on naive CFR estimates from China, we estimated CFR and IFR in China to be 1.2% (95% CI: 0.3-2.7) and 0.6% (95% CI: 0.2-1.3), respectively.

• WT
  Wellcome Trust

  Awards: 206250, 210758/Z/18/Z, 206250/Z/17/Z, Z/17/Z, 208812, 210758, 208812/Z/17/Z
• RC
  Research Councils UK

  Award: ES/P010873/1
• EA
  Economic and Social Research Council

  Award: ES/P010873/1